title: The cortical and sub-cortical network of sensory evoked response in healthy subjects.
abstract: The aim of this study was to find the cortical and sub-cortical network responsible for the sensory evoked coherence in healthy subjects during electrical stimulation of right median nerve at wrist. The multitaper method was used to estimate the power and coherence spectrum followed by the source analysis method dynamic imaging of coherent sources (DICS) to find the highest coherent source for the basic frequency 3 Hz and the complete cortical and sub-cortical network responsible for the sensory evoked coherence in healthy subjects. The highest coherent source for the basic frequency was in the posterior parietal cortex for all the subjects. The cortical and sub-cortical network comprised of the primary sensory motor cortex (SI), secondary sensory motor cortex (SII), frontal cortex and medial pulvinar nucleus in the thalamus. The cortical and sub-cortical network responsible for the sensory evoked coherence was found successfully with a 64-channel EEG system. The sensory evoked coherence is involved with a thalamo-cortical network in healthy subjects.
authors.forename: M
authors.initials: M
authors.lastname: Muthuraman
authors.forename: H
authors.initials: H
authors.lastname: Hellriegel
authors.forename: S
authors.initials: S
authors.lastname: Groppa
authors.forename: G
authors.initials: G
authors.lastname: Deuschl
authors.forename: J
authors.initials: J
authors.lastname: Raethjen
mesh_terms: D004558:Electric Stimulation; D004569:Electroencephalography; D005625:Frontal Lobe / Q000502:physiology; D064368:Healthy Volunteers; D006801:Humans; D008279:Magnetic Resonance Imaging; D008475:Median Nerve / Q000502:physiology*; D013003:Somatosensory Cortex / Q000502:physiology*